What are the ingredients in the tub fizzy which makes it fizz?
The sodium bicarbonate of the baking soda reacts with the citric acid to form carbon dioxide gas. As the carbon dioxide is released underwater, it rises to the surface as bubbles. The good part is that the carbon dioxide is not released until the mixture is hydrated. So, as long as you keep your bath bombs in a dry location, they will fizz well when they enter the water!
